1991 CART PPG Indy Car World Series

Rick Mears won the Indy 500, his record-tying fourth victory in the event.

Bobby Rahal won only one race, but had 11 podium finishes and 13 top tens.

Andretti got off to a slow start to the season, dropping out of the first two races, and finished a heartbreaking second at Indianapolis.

He won four of the last five races of the season, and needed to finish 6th or better at Laguna Seca to clinch the title.

When Bobby Rahal dropped out at Laguna Seca with overheating problems, Andretti cruised to the title.